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48 unit cubes
No, you need three measurements to measure a rectangular prism.
The answer is 3.
Three.
One possible answer is 1 unit * 1 unit * 355 units.
The answer depends on how large the prism is.
It depends on the unit. You could, for example, measure a prism in cubic metres, cubic centimetres, cubic nanometres.
48 unit cubes
A prism with an n-sided base will have 2n vertices, n + 2 faces, and 3n edges. All rectangular prisms have six faces.
No, you need three measurements to measure a rectangular prism.
volume
The answer is 3.
Without cutting the cubes and using all of them 2 different oblongs can be made: 1 by 6 and 2 by 3.
Three.
One possible answer is 1 unit * 1 unit * 355 units.
Squares cannot be used to measure a three-dimensional volume since they have only two dimensions. Squares are used to measure surface areas, such as the outer surface of a rectangular solid. Cubes are used to measure volume because they are the simplest geometric division of a three-dimensional space. For a rectangular solid, multiplying H x W x D literally tells you the number of cubes (of the given unit of measurement) that can be contained within that space.
A unit vector has a length (magnitude) equal to 1 (one unit). A rectangular vector is a coordinate vector specified by components that define a rectangle (or rectangular prism in three dimensions, and similar shapes in greater dimensions). The starting point and terminal point of the vector lie at opposite ends of the rectangle (or prism, etc.).